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Roundback Slug

Scientific Name
Arion sp.
Scientific Author
Taxonomy
(Gastropoda: Pulmonata: Arionidae)
Pest Status
0 Unknown
Status
NZ - Exotic
Reliability
High
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Diagnostic Images

Dorsal - Adult
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Caption
GAS3
Source
Caroline Harding MAF
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Diagnostic Images (2)
Diagnostic Notes
Shell internal, represented by separate calcareous granules. Mantle and back usually with lateral bands. Tail wide, obtuse; an indistinct keel present in some juveniles, but never in adults. Mantle shield without concentric ridges. Skin thick. Genital orifice immediately below pneumostome. Cephalic retractors widely separate at origin from posterior margin of diaphragm. Genital retractor short, arising from diaphragm close to left cephalic retractor, inserted into free oviduct, bursa copulatrix duct and phallus. Epiphallus strongly developed, rarely with a flagellum. Phallus vestigial, represented by an encompassing tissue ring around verge at entrance into atrium. Genitalia with or without a ligula. Epiphallus/phallus, free oviduct, and bursa copulatrix duct opening into atrium separately. Intestine with a single forward-directed loop, lacking a rectal caecum. Haploid chromosome number 25-29.

References

- Barker, G.M. (1999). Naturalised terrestrial Stylommatophora (Mollusca: Gastropoda). Fauna of New Zealand 38. Manaaki Whenua Press, Lincoln, 253 pp.
More Information
Specimen Contact
MAF Plant Health & Environment Laboratory
Author
MAF Plant Health & Environment Laboratory
Created
14/04/2011 09:11 AEST
Last Updated
19/03/2014 20:25 AEST
Citation
MAF Plant Health & Environment Laboratory (2011) Roundback Slug (Arion sp.) Updated on 3/19/2014 8:25:09 PM Available online: PaDIL - http://www.padil.gov.au.
Image Use
Free for use under the Creative Commons Attribution 3.0 Australia License

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